/Engine/Source/Runtime/GeometryCore/Public/Parameterization/UVPacking.h
Standard UE UV layout, similar to that used for Lightmap UVs. All UV islands are packed into standard positive-unit-square. Only supports single-pixel border size.
bool StandardPack ( [IUVMeshView](API\Runtime\GeometryCore\Parameterization\FUVPacker\IUVMeshView) * Mesh, int NumIslands, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(int, [TArray](API\Runtime\Core\Containers\TArray)< int32 > &)> CopyIsland )